Air heater



Aug. 2, 1932. F. M. YouNG AIR HEATER mea nay z, 1929 l l l l l l I Il l l l l.IiL W lidntented Ang., 2,. 3932 Application led May 2,

rlhs invention relates `to 'improved space heaters.

The main objects of my invention are to provide a space heater in which two heat 5 transferring units of the same type shown in' my co ending application Serial No. 358,87 2,

led pril 29, 1929, which issued as Patent No. 1,753,587, on.April 8, 1230, may .be employed for doubling the heating capacity of a lo unit space heater; to provide an improved i construction and arrangement in space heaters, of the type which create a forced draft of heated air, for facilitating the circulation of heated air in opposite directions; to provide a duplex heat interchanger for allow ing simultaneous employment of a pair of fan propellers on a single fan mptor, one for impelling the-heated draft of air in one d1- rection, and the other for impelling a heated draft of air in another direction; to provide an improved air deflecting device for divlding air drawn between the units into two op' positely directed currents for maintaining the two propellers under substantlally identical working conditions, and to impart a circular movement to the air divided between the two currents for avoiding the creation of eddy currents which normally result when the direction of movement of a current of air is suddenly changed; to provide an improved heat interchanger having communicative units for heating opositely directed air currents, and to provi e an improved mounting between said units for a fan motor.

in the accompanying drawing l have shown a specific embodiment of my invention, in which:

Fig. l is a top plan view.

Fig@ is an end elevation.

In general my improved heating unit consists of spaced heat interchangers of a thin wall type each comprising upper and lower header tanks and an intercommunicative heat transferring core. lThe heat interchangers are substantially identical in construction with that shown and described in the above copending application. The heat interchangers are positioned in substantiallyparallel planes, and `are communicatively connected at Atheir upper ends 1929. Serial No. 359,902.

of a bridge which is formed integral with the upper header tanks of the respective interchangers, and which is provided with an internal passage. The bridge is provided on its upper side with a heating medium inlet which communicates with the passage in the bridge. I

The lower header tanks of respective heat interchangers are communicatively connected by an outlet pipe which is provided with 69 a fitting for receiving a return pipe of a fluid heating system.

A fan driving means is detachably suspended from the bottom side of the bridge and is positioned substantially midway be- @5 tween the spaced heat interchangers. The shaft of the driving means extends substantially perpendicular to the vertical sides of the radiators, and it is provided at each of `its ends with a fan propeller. rl`he fan prow peller of each end of the shaft is located in close proximity to the core of one of the heat interchangers, and is adapted to impel a current of air outwardl between the vwater tubes thereof. An electric motor or fluid turbine 75 may be employed for driving the fan prope er.

The air is drawn inwardly by the fan pro-= pellers into the space between the heat transferring cores and is then forced outwardly as illustrated by the arrows in the drawing.

A deflector is provided for equally'dividing the incoming air between-the two heat transferring cores and for preventing the creation of eddy currents in the center por- @g tion of the space between the radiators which would normally tend to reduce the volume of air impelled outwardly by the fans. The delector is mounted on the motor housing, is substantially annular in shape and comprises n@ converging concaved sides which impart a circular movement to the air, thereby preventing the creation of eddy currents which are normally producedwhen air impinges against planar surfaces.

ln the form shown the improved space heater is provided with spaced heat interchanges, each comprising upper-and lower header tanks l and 2, and an intercommunicative heat transferring core 3. rlhe heat te@ transferring cores comprise a series ofvwater tubes arranged in spaced relation for providing `air passages through the core. Fins .4 extend transversely through the core 3 providing ample surface for facilitating rapid transfer of heat frm the core to a current of air passing therethrough.

The upper header tanks 1 are communica' tivel connected by a passage in a bridge 5, whic is preferably formed integral with the upper header tanks. The lower header tanks 2 are communicatively connected by an outlet pipe 6. The bridge 5 is provided with a threaded aperture for receiving a supply pipe 7 of a fiuid medium heating system and the outlet pipe 6, connected at its opposite ends to the lower header tanks 2 of the respective heat interchangers, is provided with a threaded aperture for receiving a return pipe 8 of a Huid medium heating system. By means of this construction steam, hot water or other fluid heating medium may be circulated through the s aced heat interchangers which are prefera ly connected in a fluid medium heating system in parallel relation so that substantially equal quantities of heating medium are passed through each' heat transferring core.

The improved space heater may be conveniently suspended from ceiling or other.

over head structure by attaching supporting rods, not shown in the drawing, to the plates 9, rigidly attached to the ends of the upper header tanks 1. Thesev plates are rovided with apertures 10 by means of w ich the heater may be conveniently attached to the lower extremities of depending rods. The

rods may, if desired, be threaded in apertures in the upper header tanks 1.

The lower side of the bridge 5 is provided with a substantially horizontal, machined surface which forms a mounting for a fan supporting bracket 11. The upper end of the supporting bracket 11 is provided with av ends of the motor housing and each end of the shaft is provided with a fan 15 and'16 respectively. The fan propeller 15 on the left-hand end of the motor shaft as viewed in Fig. 2, is formed to impel a current of air outwardly to the left through the core 3 of one heat interchanger and the fanv 16 on the right hand end of the motor shaft is formed to impel a current of air outwardly to the ing the incoming air substantially equally between the two heat interchangers as shown by arrows in Fig. 2.

The vertical edges of each heat transferring core 3 are provided with side plates 18. The left-hand heat interchanger is provided with a plurality of air deflectors 19 adjustably mounted on the side plates 18 and extending transversely across the front thereof. These deflectors may be positioned at any desired inclination to direct the flow of heated air either upwardly or downwardly. The left-hand heat interchanger is provided with a plurality of substantially vertical air delectors 2O pivotally mounted at their upper and lower extremities on the upper and lower tanks 1 and 2 respectively. These air deflectors may be adjustably positioned for suitably directing the current of heated air sidewise. Each heat interchanger of a unit may be provided with horizontal or vertical air dei'lectors and if desired one may be provided with horizontal air delectorsA and the other with vertical deflectors, as illustrated in the drawing.

Air is drawn into the space between'the two radiators of the heating unit through the top and bottom of the device which are open. and through the screens 21 and 22 mounted on the sides of the heating unit.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted without departing from the spirit of this invention, as dened in the following claims:

1. In a duplex heating unit spaced heat interchangers each comprising an upper and lower header tank and an intercommunicative heat transferring core, means communicative with the upper and lower header tanks respectively for .facilitating the connection of said heat interchangers in a parallel arrangement in a Huid heating medium system, an air impeller between said heat interchangers comprising a motor and spaced propellers formed to impel air outwardly therethrough in opposite directions, and means on said motor for distributing incoming air equally between said heat interchangers.

2. In a heating unit of the class described, spaced heat interchangers each comprising an upper and lower header tank and an intercommunicative heat transferring core, means communicatively connectingthe upper header tanks of each heat interchanger for facilitating the connection thereof in a fluid heating medium system in parallel relation, a fan suspended from said means between said heat interchangers comprising a fan propeller adjacent each core for propelling air outwardly therethrough, means communicatively connecting the bottom header tanks for returning the heating medium from the latter to said iiuid heating medium system, and deiectors adj ustably mounted on the buter side of one of said h eat interchangers for -directing the dow of air sidewise after it has been heatede 3. A. device of the class described comprising spaced heating units having air passages therethrough, a bridge rigidly connecting seid l heating units at their upper ends, e support rigidly mounted on said bridge and de end ing between said units comprising a tu ulair structure having flaring ends, e `fan comn prising a motor and spaced propellers rigiurl-I g@ ly mounted on the bottom end of said support, and an air deector on the housing of said motor lfor directing substantially equal amounts of air through said units respectively end comprising concaved sides for imparting e circular movement to the air to @void the Creation of eddy currents.

Signed at Chicago this 19th ydey of `ipril ieee.,

'nenn n. venne., 

